Energy use in Iceland (population 283,000) is higher per capita than in any other country in the world. Some 53.2% of the energy is geothermal, which supplies electricity as well as heated water to swimming pools, fish farms, snow melting, greenhouses, and space heating. The Nesjavellir Power Plant is a major geothermal facility, supplying both electricity and heated water to Reykjavik. The purpose of this paper is to interest students in geothermal energy. The author describes a simulation of the power plant and determines the plant's suitability for classroom study. (Contains 6 tables and 3 tables.)